% slitherlink 46 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/046.a.htm
slitherlink
very hard
8 8
...2.2.2
..2222..
....2222
....22.2
2.122.12
.2..222.
.222.2.2
22222222
